Sanding drum



- 1945- .1. P. ELLIOTT Filed March 31, 1942 i 1? mmmm a Q l xvw m$ kw n? o u v V I N 3w 8. m Q 7 W J g. QR mwm R. NW

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Patented Dec. 25, 1945 UNITED STATES PATENT OFFICE Jack P. Elliott, Westiield, Pa, assignor to Eberle Tanning Company, Westfield, Pa., a corporation of Pennsylvania Application March 31, 1942, Serial No. 437,071

4 Claims. .(01. 51 190)' I This invention relates to the art of sanding machines, and more particularly to an improved sanding drum therefor.

Prior sanding drums have comprised fixed members provided with an external sanding medium, but these have been objectionable owing to their overheating, non-adjustability, etc;

I have found that it is possible to produce a new and improved sanding drum which eliminates these disadvantages, as pointed out more particularly hereinafter,

It is therefore an object of this invention to providea new and improved sanding drum.

It is a particular object to produce a sanding drum which is adapted to avoid overheating.

It is another object to provide a sanding drum which can be easily replaced or repaired.

With the above and other objects in view, which will be apparent as the description proceeds, I have set forth my invention in the following specification and have illustrated it in the accom-- panying drawing, in which: 4

Figure 1 is a longitudinal sectional view through my improved sanding drum on the line I-I of Fig. 2;

Fig. 2 isan end elevation thereof;

Fig. 3 is a partial longitudinal view of a wrench adapted for 'use in assembling or disassembling my improved sanding drum; and

Fig. 4 is a partial longitudinal section, on an enlarged scale, showing the use of my wrench.

In the accompanying drawing, I have illustrated the preferred embodiment of my invention, which comprises six main parts as follows:

An inner sleeve I 0,

Two (2) tapered heads I I and I2, An outside ring I 3,

A cushioning material I4, and

A sanding medium I5.

with right hand internal threads 33 adapted to cooperate with the threaded periphery 3I of the sleeve I0. As shown, the heads are dish-shaped members provided with an inwardly tapering periphery 34, preferably at'an approximately 10 angle. At least one of these heads, for example head I I, is also provided with a key-way for a purpose described below.

Ring I3 is provided at each end with a reversely arranged internally tapered portion 36,

corresponding to the internally tapered periphery 34 of heads II and I2, and with a key 38. The latter may be of any desired type, but is here shown as a threaded key 38 that is received in a transverse threaded aperture and engages the key-way 35 in head I I or I2.

A particular feature of my invention is the fact that the ring I3 is also provided with a series of narrow longitudinally extendin slots 40 which preferably extend inwardly from the ends of they ring to points beyond the midzone thereof. These slots 40 are cut in staggered relation from the opposite ends of the ring. They act similarly to that of an expanding mandrel for a lathe and also provide additional means for cooling the drum.v They also are adapted to provide convenient means for. the expansion of the ring without distorting it.

The cushion I4 is of any suitable material, such as felt, and is secured to the periphery of ring I3 in any desired way, as by cementing, to provide a zone 30 and a threaded periphery 3I on either side thereof, the threads on one side being right hand and those on the other side being left hand threads. It'is also provided with a key-way 32 for a purpose to be described later.

Tapered heads II and I2 are similar except that one is provided with left hand and the other cushion between the metal of the ring I3 and the sanding medium I5.

The latter comprises a continuous band which is preferably of such diameter that it will adhere to the periphery of the cushion I4 without having to be permanently secured thereto.

As shown inFigs. 3 and 4, I have provided a wrench 45 for use with my improved sanding drum, and this comprises a handle 46 and a cylindrical head 41 at one end thereof. The diameter of head 4! is just sufficiently smaller than the internal diameter of the sleeve ID to permit its insertion into the latter. Wrench 45 is also provided with an' integral key 48 for cooperation with the key-way 32 in sleeve III.

When it is desired to assemble my drum, the head II is screwed onto the end of the sleeve I0 until the external ends of these members are nearly in alignment. This assembly is then inserted into one end of ring I3, which has the cushion I4 cemented to its periphery. The key 38 thus engages key-Way 35 in head II. The other head I2 is then screwed onto the opposite end of the sleeve I0, and inside of ring I3, until e the externalends of head l2 and sleeve H! are nearly in alignment. The sanding medium is then telescoped aroLmd the periphery of the assembled drum. Head II is then tightened on sleeve ID by engaging the'key 48 on wrench 45 with the key-way 32 insleeve III. In this way, the heads are tightened the desired amount .and the drum is expanded evenly in view of the staggered slots 40.

When it is desired to use my drum on a sanding machine, it is telescoped onto the corresponding shaft or arbor 20 until the end of the drum abuts the shoulder 2i, and nut 24 is in-,

serted on the free end of the shaft 20" and drawn up tightly against the end of the drum, thus locking all threads and other portions of the drum securely in position.

My drum may be made of any desired materials, although I prefer to make the head I l and I2 out of aluminum for the sake of lightness, and to make the ring l3 out of spring bronze to resist expansion. The cushion I4 is. preferably made of felt, although it. may, be made of any other suitable material. Where I have'referred to the sanding medium, it will be understood that this may be sand paper, emery paper; emery cloth, carborundum, or any. desired sanding material; J

It willbe seen that I have therefore developed a new and useful sanding drum which is of general application, although a preferred use is in connection with sanding machines for leather taps and soles, or similar material.

My improved sanding drum is particularly designed to provide a light, inexpensive, and efficient sanding drum which may be easily assembled or disassembled forrepair or replace: ment. It is particularly adapted to provide for expansion under heat, for convenient adjustment, and to dissipate the. heat generated in-the sanding operation.

It is apparent that manywidely different em bodiments of this invention may be made with out departing from the spirit'and scope thereof;

and, therefore, it is not intended to be limited except as indicated in the appendedclaims.

I claim:

1. A sanding drum comprising an internal sleeve, a pair of tapered heads secured on opposite ends thereof, a metal ring surrounding said heads, and a sanding medium around the periphreversely arranged tapering surfaces on the P6- riphery of the heads, a continuous metal ring provided with'similar reversely arranged tapered internal surfaces for cooperation with the tapered surfaces of the heads, means for preventing turning between the ring and the heads, a. cushion surrounding the periphery of the ring, and a sanding medium arranged around the periphery of the cushion.

4. A sanding drum, comprising a hollow internal sleeve whose ends. are reversely threaded, a pair of internally threaded heads for engagementwith the threaded portions of the sleeve, reversely arranged tapering surfaces on the periphery of the heads, a metal ring provided with similarv reversely arranged tapered internal surfaces for cooperation with the tapered surfaces of the heads, means for preventing turning between the ring and the heads, a cushion surrounding the periphery of the ring, and a sanding medium arranged around the periphery of the cushion, the ring being: provided with a plurality of longitudinally extending slots extending inwardlyfrom the opposite ends of, the ring to permit the uniform expansion of the drum and facilitate the dissipation of heat therefrom.

ACK P; ELLIO'I'I; 

